Defender Security S 4748 Fixed Window Guard, 14-Inch - 22-Inch x 15-Inch, White Inside and outside mounting options Assists in preventing children from accidental falls through open windows Not for use in bedrooms without alternate emergency exit Meets New York City, New Jersey and Oregon Home Builders Association health and safety building codes 3-7/8 in. bar spacing. Tamper resistant screws to keep window guard firmly attached